Fuel-saving device



Jan. 11,1927.

N. J. Russi-:LL

FUEL SAVING DEVICE Filed Apm ze. 1926 2 Sheetssshge: 2

..if)'IJ'NVIEDv STATES Patented Jan. 11, 1927.

.NELSON J. RUSSELL, or CHICAGO, ILLINOIS.

f g VIUIIL-sAvING DEVICE.

l @yucatan mea prix 2 6, 192s. serial No. 104,599.

My inventionlpertains yto fuel -savi'ngy devices,i and more particularlyt'o such devicesv as are usedk 1n connection with boiler lfur-V naces orsimilar furnaces,'to'feed air thereto and which are mounted inthe fluesthereof which conduct the heat currents from the firebox to'the smokechamber of such VAboiler furnaces.

Thev main obiect o-f myV invention is to provide an improved fuel savingdevice@ which can be readily mounted or installed in a boiler furnaceand in the i'lues thereof, and which will receive atmospheric air,preheat the same, and conduct and discharge the atmospheric air into theheat currents issuing from the `fireloox and before such currents, enterthe iiues on' their passage to the smokechamber and smoke stack.lAnother object is to `provide such a device including'a casing withoutlet openings at one end placedadj-acent the inlet end of a iiue andincluding a pipe. threaded in thek opposite end of said casing andextending there-l from through the discharge end of said flue, into theatmosphere, said device preferably including means for closing? theoutlet end of said flue.V And another object is to provide a'casingwithoutlet openings and partition walls, and a Vcompressor membermounted on said walls to diminish the interior space in said casing andto compress the air passing through the casing before it issues, fromthe outlet openings.

Other objects and advantageous ends are accomplished with my invention,as will become apparent from the following description taken inconnection with the accompanying drawings` in which,

Fig. 1. is a vertical longitudinal sectional View of a portion of astraight draft boiler furnace, showing avfuel saving device eminventionmounted in a flue,

bodying my f th rom e with its discharge end protruding flue;

Fig. 21s-asimilar v1ew,.of a return tubuv lar boiler furnace,illustrating my invention app-lied thereto and mounted within the flue;Fig'. .3 is anenlarged longitudinal section through a flue with myinvention mounted therein and the discharge end of the casing protrudingfrom the flue;

Fig. l isa view similar to that shown in Fig. 3, and showing theoperativeness and efciency of the device, even though the protruding endof the casing is burnt off or lbroken away or otherwise damaged;

Vvide a space or chamber 5 is a cross section on of*l Fig. 3; and p Fig.6 is yan enlarged View similar to Fig.

3', but showing the discharge end of vthe casing mounted entirely withinthe liuc.

In Fig. 1 of the` drawings I have shown i a form of my invention mountedin position in a boiler furnace 10 which'includes the usual firebox 11and grate12 vat the Afront,` of a boiler furnace and a'smoke chamber 1 3at the rear thereof leading vto the smoke stack (not shown), said smokechamber also serving the function of a combustionv cham! ber in thistype of furnace. A boiler portion or heating portion 14 communicateswith the liirebox l1 and includes a plurality of iiues 15 for conductingthe heated air' and smoke, or the heat currents, from the fireb'ox 11 tothe smoke chamber 13. vThe furnace is also provided with the usual door16 affording access to the lirebox and to the flues and providing a firedoor as well 'as al iiue cleanout door.4 n

My improved fuel saving Vdevice is mount- `ed in one or more of. these`iiues 15, and the casing 17 provided with a perforated outlet A Iportion or end 18, preferably tapering or conical in shape, and havingout-letv openings 19 provided around said tapering end, and an opening19 on the narrowed end `or point. This taperingportion is partiallyextended beyond thev flue, as shown in Figs. land 3. rIhe opposite endof the casing is provided with a thickened end wall 20 or thickened inpart and having 'a threaded opening for receiving the threaded end 21 ofa pipe 22 which extends through the other end or discharge end of theflue and through the furnace wall, beyond the furnace, into theatmosphere.

I provide this casing with -intersecting partition walls or members 23which are stopped short of the endk wall 20,.. to pro- 24 between theend wall and the partition walls, thus permitthe Hrebox to the Hues andthere-through to the smoke chamber. A ring 26 is preferably placedaround the pipe at the discharge end of the Hue near the smoke chamber,for'sup- Y transverse direction, due to the compressor` member 25, whichis effective for compressing the air and directing `it transverselythrough the openings 18, so as to properly mingle with the heat currentsissuing from the Hrebox. j

In Fig. 2 of the drawings is shown a boiler furnace in which the smokechamber 13 is located at the front of the furnace, and the heat currentstravel from the Hrebox 11 and the grate 12 rearwardly beneath the boilerportion or heating portion 111. to the combustion chamber 13, andtherefrom through the Hues 15 into the smoke chamber 13 and up to thechimney. The usual door 16 is also provided to permit access to the Huesand smoke chamber' and for cleaning out of the Hues.

The fuel saving device shown in this formV is substantially the same asin the preceding form, including a casing 17 with tapering end 18 anddischarge openings 19 and 19, and the thickened end wall 2O andpartition wall 23 with a compressor member 25. The pipe 22 has its end21 likewise threaded into end wall 20 and extends from the Hue andbeyond the furnace into the atmosphere. But in this form, as shown inFigs. 2 and 6, the tapering end 18 of the casing is mounted entirelywithin the inlet end of the Hue,

' while at the outlet end of the Hue the pipe 22 is supported by a ring26 and said end of the Hue is furthermore closed or sealed by sealingmeans 27, as cement or the like. This ring 26, as well as the sealingmeans 27, may be omitted from the device, especially where theperforated tapering portion 18 is extended from the Hue, as shown inFigs. 1 and 3.

It is apparent from the foregoing disclosure that this fuel savingdevice is arranged and constructed so that it can be readily installedin the various types of boiler furnaces, by entering the casing throughthe usual fire-door or cleanout-door, and mounting it in the Hue, whilethe air intake pipe is likewise insertable through said door and isextended through a hole .provided in the furnace wall for this purpose,and is therefrom extended beyond the furnace into the atmosphere, totake in the `heat currents arising from the Hreboxin their passage tothe Hues and therefrom to the smoke chamber. Y Y

W hat l claim as my invention and desire to securey by Letters Patentis:

l. rlhe combination, with a furnace havingl a firebox and Hues forreceiving heat currents from sai-d firebox, of an air feeding casingwith longitudinally extending intersecting partition walls mountedin'one of the Hues, a pipe extending from said casing through the Hueand beyond Athe furnace into the atmosphere, and a tapering portion withoutlet openings on said casing andplaced adjacent the receiving end ofsaid Hue for spreading and exposing the air fromv said sov casing to theheat currents before they enter Y v the Hues. Y Y

2. The combination, with a furnace having a iireb-ox and Hues forreceiving heat currents from said firebox, of an air feeding casingmounted in one of said-Hues, and having longitudinal intersectingVpartition walls, and a compressor member on the intersecting partA ofsaid walls to diminish the space at the discharge end of said casing andthereby compressing the air in its passage through the casing andthrough the outlet openings thereon.

3. The combination, with a furnace having a Hrebox and Hues forreceiving heat currents from the Hrebox, of an air feeding casingmounted in the receiving end of one of said Hues and having a taperingportion with outlet openings located adjacent said receiving end of theHue, a compressor block in said casing adjacent said tapering portionfor compressingthe air in the passage through said casing out of theoutlet openings, and a pipe extending from the opposite end of saidcasing out of the furnace into the atmosphere.

4. A fuel saving device for a furnace with tubular Hues, said devicecomprising a casing with outlet openings at one end and a thickened wallwith a threaded opening at the opposite end, an inlet pipe threadedintosaid end wall, and partition walls extending longitudinally through saidcasing to divide it into sections and stopping short of said end walland forming a space therewith to permit complete threading and enteringof the pipe end through said end wall and into said space.

5. A fuel saving device for a furnace with tubular Hues, said devicecomprising a casing with a tapering portion having outlet openings atone end, a thickened wall with a threaded opening positioned at theopposite end of said casing, an inlet pipe threaded into said threadedopening, longitudinal -partition Walls in said easing stopplng enteringof the pipe end through the end Wall into said space, and a compressermember on said partition Walls located 1n said tapering portion fordiminishing the space therein to compress Vthe air in its passagethrough said tapering portion and through 10 the outlet openingsthereon.

In testimony whereof I have signed my name to this specification.

NELSON J. RUSSELL.

